Computational and experimental investigation on effective utilization of waste heat from diesel engine exhaust using a fin protracted heat exchanger

Ravi, Rajesh; Pachamuthu, Senthilkumar; Kasinathan, Padmanathan

doi:10.1016/j.energy.2020.117489

Cited by 33 publications

(13 citation statements)

References 39 publications

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“…According to the available literatures, HRSG modeling of a cogeneration plant are performed with different approaches including energy modeling, [27][28][29] energy and exergy modeling, 30,31 exergo-economic modeling, 8,10,18,21 energy-economic modeling, 32,33 and the major prime movers used in cogeneration or CHP systems such as gas turbine 8,10,34,35 or diesel engine. 32,[36][37][38][39][40][41][42] Accordingly, the comprehensive modeling and optimization of fire tube HRSG in energy, exergy, and economic aspects for a gas microturbine cogeneration plant were not found in open literature. Although the design procedure for water and fire tube HRSGs are almost similar and the only difference returns to different heat transfer coefficients, but the main focus of research activities is on water tube HRSGs for their wide usage in CCPP.…”

Section: Application Of Hrsg In Novel Cyclesmentioning

confidence: 99%

“…According to the available literatures, HRSG modeling of a cogeneration plant are performed with different approaches including energy modeling, 27‐29 energy and exergy modeling, 30,31 exergo‐economic modeling, 8,10,18,21 energy‐economic modeling, 32,33 and the major prime movers used in cogeneration or CHP systems such as gas turbine 8,10,34,35 or diesel engine 32,36‐42 . Accordingly, the comprehensive modeling and optimization of fire tube HRSG in energy, exergy, and economic aspects for a gas microturbine cogeneration plant were not found in open literature.…”

Section: Introductionmentioning

confidence: 99%

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Modeling and optimization of finless and finned tube heat recovery steam generators for cogeneration plants

Ghaffari

Ahmadi

Eyvazkhani

2020

Engineering Reports

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This article aims to model and optimize the fire tube Heat Recovery Steam Generator (HRSG) used in a gas microturbine cogeneration of heat and power system. Here, six cases including a finless and finned tube (solid and serrated) HRSGs with the inline and staggered arrangements are optimized and compared using techno-economic assessment. Optimization of HRSG was carried out by applying two objective functions of minimizing the total annual cost as well as maximizing the exergy efficiency. Nondominated Sorting Genetic Algorithm II is used to find out the optimal values of design variables. The TOPSIS decision-making process is employed to choose the optimum point of the Pareto front. A 600 kW gas microturbine cogeneration plant is considered as a case study. The results revealed that the finless tube HRSG with an inline arrangement has the lower pinch and approach temperatures (3.5 • C and 3.1 • C, respectively), the higher steam mass flow rate (12.7%), the lower total annual cost (64 096$/year), and the higher exergy efficiency (60.6%). It is also found that using the staggered arrangement tube banks along with the solid fins in HRSG leads the total annual cost, the steam mass flow rate, and exergy efficiency increase up to 41.6%, 100%, and 12.6%, respectively. This means that the thermodynamic performance improvement will compensate the total annual cost increment. Furthermore, it is demonstrated that HRSG with solid fins and staggered arrangement with total annual costs of (90 810$/year), exergy efficiency of (73.2%), and steam mass flow rate of (4680 kg/h) has the best performance in comparison with other finned tube cases. K E Y W O R D S cogeneration of heat and power systems, gas microturbine, genetic algorithm, heat recovery steam generator, inline and staggered arrangement, multiobjective optimization 1 INTRODUCTION In combined heat and power (CHP) systems, the prime mover waste heat is recovered to produce hot water/steam for heating or power generation. Heat recovery along with power generation, increases the efficiency of CHP systems up to This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

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Section: Application Of Hrsg In Novel Cyclesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Modeling and optimization of finless and finned tube heat recovery steam generators for cogeneration plants

Ghaffari

Ahmadi

Eyvazkhani

2020

Engineering Reports

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“…It is a commonly utilized and approved technique, since it can permanently degrade plastic waste with huge volumetric basis and thermal energy recovery, which may then be converted to electrical energy [8]. It also helps to regulate carbon emissions in the conventional energy industry by substituting alternative fuels [9]. Incineration of plastic wastes resulted in the release of very dangerous toxic pollutants and dusts which are more harmful to all living organisms [10].…”

Section: Introductionmentioning

confidence: 99%

Production and Optimization of Energy Rich Biofuel through Co-Pyrolysis by Utilizing Mixed Agricultural Residues and Mixed Waste Plastics

Vibhakar

Sabeenian²,

Kaliappan³

et al. 2022

Advances in Materials Science and Engineering

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Two totally waste products, agricultural residues and mixed plastic wastes collected from domestic and industrial sectors, are used in this study for the recovery of energy rich biofuel and value-added chemicals. The copyrolysis experiments using fixed bed reactor are conducted in order to analyse the synergetic effects. The experimental works are carried out with different proportion of mixed plastics blended with agricultural residues. The reaction temperature and biomass-to-waste plastics ratio on product distributions are studied and addressed. The thermogravimetric analysis conducted at different temperatures clearly distinguished the pyrolysis behaviours of biomass and plastics. The positive synergistic effects defined as higher yield of volatiles compared to predicted yield for bio-oil were identified at particular mixing ratio. Both biomass wastes and plastic wastes show optimal performance of 60.42 wt% oil yield at 60% addition of waste plastics. The oil products obtained under favourable conditions have a higher heating value compared to the oil obtained from biomass pyrolysis. The GC-MS study confirmed that the interaction between biomass and plastics during copyrolysis resulted in decreased oxygenated contents in the oil products.

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“…Its main function is to allow full heat exchange between liquid oxygen and high-temperature fuel gas, resulting in the evaporation of the liquid oxygen into gas oxygen, which then enters the storage tank of the rocket oxidizer under the effects of pressure to provide a stable supply of propellant for the engine; therefore, the efficiency of the heat exchanger is one of the key factors affecting the performance of the engine [1][2][3]. At present, the structure of heat exchangers is typically designed in the form of an array-distributed rectangular milling groove structure or a spiral groove structure [4,5], which is formed by tailor-welding a split structure [6,7]. The uneven flow of the molten pool during the welding process causes the channel to be blocked, and the residual stress after cooling is likely to cause deformation or even cracking, making the engine to function inefficiently.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Heat Transfer Characteristics of a Heat Exchanger Based on a Lattice Filling

et al. 2021

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In response to the heat load requirements of the high-thrust liquid rocket engine, a light-weight lattice structure is used to fill traditional a heat exchanger. A parameterized model library of the lattice structure is established, and the relative density of the lattice structure is adjusted by changing the unit cell structure parameters to obtain different filling structures. A comprehensive comparison of heat exchangers with different filling structures performed in terms of weight, heat transfer efficiency, and turbulence intensity. Using the finite difference method, the numerical calculation of the non-steady heat–fluid–solid coupling conjugate heat transfer of the eight-lattice structure is performed, and the dynamic heat transfer process between the lattice structure and liquid oxygen is simulated using the VOF model and the SST k-ω model. The results show that the pressure of the fluid in the heat exchanger increases with increasing relative density, leading to a high outlet temperature and greatly increasing the outlet velocity. The support trusses close to the wall obviously hinder the flow of liquid oxygen, resulting in a sudden change in the flow rate behind the support trusses, driving the high-temperature fluid at the bottom to move upwards. The direction of the support trusses and the unit cell porosity have a greater impact on the liquid oxygen flow rate, which in turn affects the flow and heat transfer performance of the heat exchanger. In consideration of the heat load requirements of the heat exchanger, star-type lattices are used to fill the heat exchanger. When the flow is fully developed, the volume ratio of the heated fluid is 85.60%, and the outlet temperature is 390 K, which meets the design requirements.

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Computational and experimental investigation on effective utilization of waste heat from diesel engine exhaust using a fin protracted heat exchanger

Cited by 33 publications

References 39 publications

Modeling and optimization of finless and finned tube heat recovery steam generators for cogeneration plants

Modeling and optimization of finless and finned tube heat recovery steam generators for cogeneration plants

Production and Optimization of Energy Rich Biofuel through Co-Pyrolysis by Utilizing Mixed Agricultural Residues and Mixed Waste Plastics

Analysis of Heat Transfer Characteristics of a Heat Exchanger Based on a Lattice Filling

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